Contractions????

Kathy • 39, Married March 2015. Have 4 boys ages 18,15,11, 6. 3 younger boys are mine and hubby's together. He has a 29 & 18 yr old from others. This one is a girl.
It's been over 18 years since I have felt actual contractions. I only went to active labor with my now almost 19 year old son. Other 3 had planned c-sections. Doc told me other day if I started having any to go get checked cause this one will be c-section as well. All I have been getting is lots of pressure last hour and half. Some I can tell it's the baby but others I can't tell. Just so ready to have her. What do you ladies think I should do?